Chemistry

Question 1

Father of Modern Chemistry

Answer 1

Antoine Lavoisier

Question 2

Father of Modern Science

Answer 2

Democritus

Question 3

Proponent of modern atomic theory

Answer 3

John Dalton

Question 4

Developed the periodic table

Answer 4

Dimitri Mendeleev

Question 5

Solid to Gas

Answer 5

Sublimation

Question 6

Gas to Solid

Answer 6

Deposition

Question 7

Method by which a mixture is separated by distributing its component in a stationary and mobile phase

Answer 7

Chromatography

Question 8

Separating of miscible liquids

Answer 8

Fractional Distillation

Question 9

Any given compound always contains exactly the same proportions of elements by mass.

Answer 9

Law of Definite Proportions/ Law of Constant Compositions/ Proust’s Law

Question 10

Mass is neither created or destroyed in a chemical reaction (Law)

Answer 10

Law of Conservation of Mass

Question 11

When two elements form a series of compounds, the ratios of the masses of the second element that combine with 1 unit of the first element can always be reduced to small whole numbers (Law)

Answer 11

Law of Multiple Proportions

Question 12

Who discovered the electrons via cathode ray tube?

Answer 12

Joseph John Thomson

Question 13

Who discovered the nucleus via gold foil experiment?

Answer 13

Ernest Rutherford

Question 14

Who discovered the protons?

Answer 14

Ernest Rutherford or Eugene Goldstein

Question 15

Who discovered the Neutron?

Answer 15

James Chadwick

Question 16

Size of an atom

Answer 16

Atomic Radius

Question 17

Amount of energy required to remove a valence electron

Answer 17

Ionization Energy

Question 18

measure of tendency of an atom to attract a bonding pair of electrons

Answer 18

Electronegativity

Question 19

measure of energy change when an electron is added to a neutral atom to form a negative ion

Answer 19

Electron Affinity

Question 20

tendency to lose electrons and form cation

Answer 20

Metallic Characteristic

Question 21

Tendency to gain electrons and form anion

Answer 21

Non-metallic characteristic

Question 22

Recite first 20 elements of the periodic table

Answer 22

H, He, Li, Be, B, C, O, F, Ne, Na, Mg, Al, Si, P, S, Cl, Ar, K, Ca

Question 23

equal number of protons

Answer 23

Isotopes

Question 24

equal number of neutrons

Answer 24

Isotones

Question 25

Equal mass number

Answer 25

Isobars

Question 26

same molecular formulas but differ in structures and properties

Answer 26

Isomers

Question 27

same electron configuration

Answer 27

Isoelectronic Properties

Question 28

describes how electrons are distributed among various orbitals

Answer 28

electron configuration

Question 29

Quantum number that determines the energy state of an electron.

Answer 29

Principal Quantum Number (n)

Question 30

Quantum number that indicates number of subshells and shape of orbital

Answer 30

Angular Momentum Quantum Number (l)

Question 31

Quantum number that describes the orientation of orbital in space

Answer 31

Magnetic Quantum Number (ml)

Question 32

Quantum number that describes the intrinsic angular momentum (spin) of an electron within an atom.

Answer 32

Electron Spin Quantum Number (ms)

Question 33

building-up principle; electrons fill the orbitals starting at the lowest available energy levels before filling higher levels.

Answer 33

Aufbau Principle

Question 34

no two electrons can have the same set of four quantum numbers.

Answer 34

Pauli’s Exclusion Principle

Question 35

every orbital in a subshell is singly occupied with one electron before any orbital doubly occupied and all electrons in singly occupied orbitals have the same spin

Answer 35

Hund’s Rule

Question 36

an aggregate of at least two atoms in a definite arrangement held together by chemical forces.

Answer 36

Molecule

Question 37

Recite the 7 diatomic molecules

Answer 37

Hydrogen, Nitrogen, Oxygen, Fluorine, Chlorine, Bromine, and Iodine

Question 38

Ion

Answer 38

atom or group of atoms that has a net positive or negative charge

Question 39

Differentiate Empirical from Molecular Formula

Answer 39

Empirical - simplest whole number ratio, Molecular - exact number of atoms

Question 40

Differentiate Polar Covalent Bond from Nonpolar Covalent Bond

Answer 40

Polar - electrons unequally shared (unsymmetrical) Nonpolar- electrons are equally shared (symmetrical)

Question 41

Bond that transfer of electrons from metallic to non-metallic to form ions

Answer 41

Ionic Bond

Question 42

force of attraction between valence electrons and the metal ions

Answer 42

Metallic Bonds

Question 43

branch of chemistry dealing with the quantitative relationship between constituents in a chemical substance

Answer 43

Stoichiometry

Question 44

amount of substance that contains as many elementary entities (atoms, molecules, ions, etc.)

Answer 44

Mole

Question 45

number of constituent particles, usually atoms or molecules that are contained in the amount of substance given by one mole

Answer 45

Avogadro’s Constant

Question 46

It expresses the concentration of solutions as the number of moles of solute per volume of solution in liters.

Answer 46

Molarity

Question 47

Number of moles of solute present in 1kg of solvent

Answer 47

Molality

Question 48

It expresses the concentration of solutions as the number of moles of solute per volume of solution in liters.

Answer 48

Molarity

Question 49

Molarity Formula

Answer 49

Question 50

Molality Formula

Answer 50

Question 51

pH and pOH equations

Answer 51

Question 52

pH and POH relationship formula

Question 53

pH and pOH equations

Answer 53

Question 53

pH and POH relationship formula

Answer 53

Question 54

Dalton’s Law of Partial Pressure Formula

Answer 54

Question 55

RMS Speed of Gas Formula

Answer 55

Question 56

gradual mixing of molecules of one gas with molecules of another by virtue of kinetic properties.

Answer 56

Diffusion

Question 57

process by which a gas under pressure escapes from one compartment to another.

Answer 57

Effusion

Question 58

rate of diffusion formula

Answer 58

Question 59

two protons and neutrons bound together into a particle identical to a helium nucleus; can be blocked by a thin sheet of paper

Answer 59

Alpha particle

Question 60

high-energy, high speed electron beam due to decay of free neutrons; can be blocked by metal foils.

Answer 60

Beta particle

Question 61

EM radiation of extremely high frequency; biologically hazardous

Answer 61

Gamma radiation

Question 62

Mean Free Path Formula

Answer 62